ORLANDO, Fla. -- Prosecutors in the Casey Anthony murder trial called witnesses Friday to bolster their contention that her mother couldn't have been home to perform Internet searches for a harmful chemical.
Testimony by two of Cindy Anthony's co-workers -- among the last of the trial -- was intended to disprove her surprising assertion this week that she was the one who keyed in searches for the term "chloroform."
Prosecutors have argued that Casey Anthony made the searches as she plotted to kill her 2-year-old daughter in 2008.
Prosecutors used parts of Friday and the previous day to give their rebuttal to the defense's case.
Closing arguments are expected tomorrow, after which jury deliberations will begin.
John Camperlengo, chief compliance officer for Gentiva Health Services, answered questions about Cindy Anthony's work history on two days in March, 2008, when the "chloroform" searches were done on a computer at the Anthony household.
The company's electronic records show that she was logged into her company's system for most of the day on both March 17 and March 21.
Using the latter date as an example, Mr. Camperlengo said the system would not have recorded Cindy Anthony's presence if a person hadn't been actively using the work computer.
"Someone human was pushing the enter button to enter data," he said Friday.
Cindy Anthony's supervisor at Gentiva, Deborah Polisano, also testified that electronic work records show that Cindy Anthony was on the clock for 10 hours on March 17 and nine hours on March 21.
Earlier this week, Cindy Anthony testified that she had performed the Internet searches for "chloroform" while looking up information on chlorophyll, a green pigment found in plants. Chloroform, on the other hand, is a chemical that can be used as a sedative and is fatal to children in small doses.
She testified that she was home on the days when the computer searches were run.
She said she could leave work when she wanted and that the work records might not reflect her absence.
Casey Anthony is charged with first-degree murder in the 2008 death of her 2-year-old daughter, Caylee. If convicted of that charge, she could face the death penalty.
The prosecution contends she used duct tape to suffocate the toddler, while the defense says the girl accidentally drowned in her grandparents' swimming pool.
Forensic anthropologist Michael Warren was called back to the witness stand Friday to dispute a defense expert's claim that the medical examiner made a mistake by failing to saw open Caylee's skull to examine it.
The defense has tried to cast doubt on the forensic evidence in the trial.
"No sir, there is no protocol that I'm aware of to do that," Mr. Warren said.
Both sides have Saturday off to settle on final instructions for the jury and prepare their closing arguments.
Earlier Friday, lead defense attorney Jose Baez said prosecutors had failed to disclose all the information about which a computer expert and forensic anthropologist planned to testify.
Mr. Baez wanted the evidence and witnesses to be excluded but Judge Belvin Perry only gave him the option of taking their depositions.
He did, causing an unscheduled recess that lasted throughout the morning.